Thread subject: Diptera.info :: ID, please Tabanidae?
Posted by Juergen G on 16-01-2018 22:29
#1
Who can help to identify this fly?
Location: Germany, North Rhine-Westphalia, garden in Vreden, about 10mm
Date: 17.06.2017
Thanks.
Jürgen
Posted by Juergen G on 16-01-2018 22:29
#2
The second image of the same.
Posted by Paul Beuk on 17-01-2018 08:25
#3
Chrysops sepuchralis
Posted by Zeegers on 17-01-2018 08:47
#4
Alas, classic mistake.
It is the male of Ch. caecutiens.
Theo
Posted by Paul Beuk on 17-01-2018 10:48
#5
Thanks for the thumbs up! :D
As far as I can see there is nothing distinct in your key of 2000 that would lead to
caecutiens here, so can you please elaborate?
Posted by Zeegers on 17-01-2018 21:02
#6
Yes, that is true, both featured mentioned in the key are not visible here.
Still, the ID can be made on the wing pattern: in caecutiens much darker than in sepulchralis, in caecutiens the outer border of the black belt is convex without appendix at radial vein and an inner basal transparent area is totally or completely lacking.
Moreover, but this is cheating: in June, male caecutiens is common and sepuchralis very rare, more an August species. Plus a garden in Vreden is clearly suited for caecutiens (river !), and clearly not for sepuchralis. The peat bog is 20 km. north at Haaksbergen (indeed, currently the biggest population of sepulchralis by far)
Theo
Posted by Paul Beuk on 18-01-2018 17:10
#7
Thx